Update app.py

app.py

@@ -49,7 +49,7 @@ def main():
                     """
                 Visual Document Retrieval Benchmark leaderboard. To submit results, refer to the corresponding tab.  
                 
-                Refer to the [ColPali paper](https://arxiv.org/abs/XXXX.XXXXX) for details on metrics, tasks and models.
+                Refer to the [ColPali paper](https://arxiv.org/abs/2407.01449) for details on metrics, tasks and models.
                 """
                 )
                 datasets_columns = list(data.columns[3:])